Question

24km upstream + 28 km downstream in 6 hours

30km upstream + 21 km downstream in 6 .1/2 hours

find out speed or x and y plz answer fast its an urgent

Answer 1

Answer:

4kmph

Explanation:

If speed of the boat be x and stream speed be y 

according to the question, 

24/(x-y) + 28/(x+y) = 6 

30/(x-y) + 21/(x+y) = 6.5 

Taking 1/(x-y) as X and 1/(x+y) as Y 

24X + 28Y = 6 

30X + 21Y = 6.5 

solving for X and Y  

X = 1/6 and Y = 1/14 

So,

x-y = 6

x+y=14

Hence, 

x = 10 kmph and y = 4kmph